BlackRock, Inc. Reduces Position in Tenable Holdings to 10.3% Ownership

On June 4, 2026, BlackRock, Inc. filed a Schedule 13G/A with the SEC, reporting a 10.3% ownership stake in Tenable Holdings, Inc. (TENB). The filing indicates that BlackRock beneficially owns 11,304,271 shares of common stock. This represents a decrease from the previously reported position of 13,497,402 shares, although the ownership percentage is now codified at 10.3%. BlackRock reported sole voting power over 11,114,148 shares and sole dispositive power over the full 11,304,271 shares. The securities were acquired in the ordinary course of business and are not held for the purpose of changing or influencing the control of the issuer. Various subsidiaries of BlackRock, including BlackRock Fund Advisors and BlackRock Advisors, LLC, are listed as entities through which the shares are held. The event triggering this filing occurred on May 31, 2026. Despite the reduction in share count, BlackRock remains a significant institutional shareholder in the cybersecurity firm.